Mac OS 用NSView做出按钮效果

class CustomViewButton: NibView {

    var trackingArea: NSTrackingArea?

    var select = false

    

    var normalImg: NSImage?

    var selectImg: NSImage?

    

    var normalColor = NSColor.white

    var selectColor = Color.themeColor

    

    @IBOutlet weak var image: NSImageView!

    @IBOutlet weak var title: NSTextField!

    

    override func draw(_ dirtyRect: NSRect) {

        super.draw(dirtyRect)

        

        wantsLayer = true

        self.layer?.backgroundColor =  colorLiteral(red: 0.262745098, green: 0.5059999824, blue: 1, alpha: 1)

        title.textColor = normalColor

        image.image = normalImg

    }

    

    override func mouseUp(with event: NSEvent) {

        super.mouseUp(with: event)

        

        if event.type == .leftMouseUp {

            select = !select

            if select {

                self.layer?.backgroundColor =  colorLiteral(red: 1, green: 1, blue: 1, alpha: 1)

                title.textColor = selectColor

                image.image = selectImg

            }else {

                self.layer?.backgroundColor =  colorLiteral(red: 0.262745098, green: 0.5059999824, blue: 1, alpha: 1)

                title.textColor = normalColor

                image.image = normalImg

            }

        }

    }

    

    override func mouseDown(with event: NSEvent) {

        super.mouseDown(with: event)

        

        if event.type == .leftMouseDown {

            self.layer?.backgroundColor =  colorLiteral(red: 1, green: 1, blue: 1, alpha: 1)

            title.textColor = selectColor

            image.image = selectImg

        }

    }

    

    override func mouseEntered(with event: NSEvent) {

        super.mouseEntered(with: event)

        

        if !select {

            self.layer?.backgroundColor =  colorLiteral(red: 0.3385708332, green: 0.554590404, blue: 1, alpha: 1)

            title.textColor = normalColor

            image.image = normalImg

        }

    }

    

    override func mouseExited(with event: NSEvent) {

        super.mouseExited(with: event)

        

        if !select {

            self.layer?.backgroundColor =  colorLiteral(red: 0.262745098, green: 0.5059999824, blue: 1, alpha: 1)

            title.textColor = normalColor

            image.image = normalImg

        }

    }

    

    override func updateTrackingAreas() {

        super.updateTrackingAreas()

        

        if trackingArea != nil {

            removeTrackingArea(trackingArea!)

        }

        

        let options: NSTrackingArea.Options = [.inVisibleRect, .mouseEnteredAndExited, .activeAlways]

        trackingArea = NSTrackingArea(rect: .zero, options: options, owner: self, userInfo: nil)

        addTrackingArea(trackingArea!)

    }

}

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